The PT1000 temperature sensing resistor is accurate sometimes and inaccurate other times; what could be the reasons? ? ?

2017-07-31View Original

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I’ve been conducting experiments recently and found that the temperature difference between the inlet and outlet on the indoor side of the unit is quite large. Whenever the unit is running, the temperature is inaccurate; once the unit stops, the temperature returns to a reasonable range. When water was used as the cooling medium earlier, there were no issues at all during operation. The temperature sensing probe was not touched either, due to vibrations and other reasons. I haven’t been able to find the problem; I would appreciate it if everyone could help analyze what the cause might be.

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The PT1000 temperature sensing resistor is accurate sometimes and inaccurate other times; what could be the reasons? ? ?

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